Head receiver set



I E. A. BOHL REcEIvER SET Filed May 1922 Y [m ErfiFsTfiBaHma PatentedDec. 29, 1925.

UNITED STATES PATENT OFFICE.

ERNEST A. BOHLMAN, OF CHICAGO, ILLINOIS, ASSIGNOR 'lO KELLOGGSWITCHBOARD AND SUPPLY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OFILLINOIS.

IIEAD RECEIVER SET.

Application filed May 20, 1922.

To all whom it may concern Be it known that I, ERNEST A. BOHLMAN, acitizen of the United States of America and resident of Chicago,Illinois, have invented certain new and useful Improvements in HeadReceiver Sets, of which the following is a specification.

My invention relates to head receiver sets in general, and has to domore particularly 19 with animproved receiver head set for use intelephone or radiophone receiving, when it is desired to have twoearpieces properly fitted and held against the ears in the bestpositions for hearing, and at the same time comfortably.

Prior to my invention, various means of adjustment have been employed toadjust the ear-pieces on the head band to accommodate heads of varioussizes and shapes. Set screws and other devices have been used, but thesehave never proved entirely satisfactory in that it required some time inwhich to malre a proper adjustment of the ear pieces and almostinvariably the wearer was compelled to remove the set from her head inorder to make the adjustment desired. To overcome the necessity ofremoving the receiving set \from the wearers head and to reduce the timerequired to make an adjustment of the ear pieces, I have provided animproved adjust-able member for adjustably supporting the car pieces inany adjustable position, by means of frictional resistance, said adjustable member being constructed so that any adjustment of the ear-piecemay be readily effected without removing the receiver set from the headof the wearer.

For a more complete understanding of my invention, reference may be hadto the accompanying drawing, in which like reference characters in theseveral views, denote like parts, and in which Fig. 1 is an elevation ofa complete head .set embodying my invention;

F ig. 2 is an elevation of one of the earpieces and of the adjustablemember of my invention Fig. 3 is a side elevation of the receiving setshowing one of the ear-pieces adjustably supported by the head-band bymeans of my adjustable member.

Referring now more in detail to my inven tion as illustrated, I show apair of head bands 1, each being suitably formed so as to Serial No.562,313.

fit snugly over the top of the head of the wearer. The arch of each headband 1 is encascd between two strips of flat webbing 2 or some othersuitable material to permit the head bands to rest upon the wearers headin a more comfortable manner. Each pair of ends 3 of the head bands 1are inserted into one end of a cylindrical supporting member or post *1which has its one end flattened to receive said pair of ends 3. Afterthe pair of ends 3 have been inserted into the flattened end of thesupporting member 4, they are spaced and securely held in place by meansof a punching operation which presses the walls of the member 4%together at points 5, 6 and 7.

Referring now to the adjustable supporting member for adjustably holdingthe receivers It in their adjusted positions, and since both are thesame, a description of one will suiiice, I provide a supporting member 8which has its ends 9 turned back parallel to each other. Intermediatethe ends of the member 8 is a portion '10 greater in width than anyother part of the member and which enlarged portion 10 is formed into aloop 1]. of a size slightly smaller than the diameter of the supportingpost i. but of sutiicient size to receive said post 4. Between the ends9 of the member 8 is pivotally supported the receiver casing RU by meansof pins 12, which are suitably secured to the ends 9, and which engagesuitable orifices in the casing BC to permit the casing to be pivotallysupported thereon.

To assemble the receiver set, the free end of the post t is insertedinto the loop 11, and since the loop 11 is slightly smaller in size thanthe diameter of the post 1-. the loop 11 will be slightly spread apart,thus producing clamping means which will securely maintain the.supporting member 8 in any adjusted position against ordinarily no1= malpressure or force exerted upon it. Should it be necessary to adjust theearpieces R, the same may be effected by sliding the post 4 in an upwardor downward direction, depending on the desired adjust,- ment. lVhen theabnormal force used in sliding the post 4 through the loop 11 iswithdrawn, the member 8 will remain on the post at in its adjustedposition due to the frictional resistance existing between the said post4 and loop 11.

To prevent the entire removal of the ad justable member 8 from the headband. I provide a screw 13 which has screw-threaded engagement with anorifice provided in the free end of the post 4, and which screw 13 has ahead of a larger size than the opening in the loop 11 and in order toremove the member 8 from the post 4;, it will be necessary to firstremove the screw 13.

From the foregoing, it is apparent that I have devised a very efficientbut cheap to construct adjustable receiver supporting device, I provideone member which not only pivo'tally supports the ear-piece, but alsoadjustably supports the ear-piece on the supporting postwhich is securedto the head band, and I have so associated the said member and said postwhich permits any adjustment to be made readily without removing thereceiver set from the head of the wearer.

While I have illustrated and described a preferred embodiment of myinvention, it is to be understood that changes and modifications willreadily suggest themselves, but I am to cover all such changes andmodifications as come within the spirit and scope of the appendedclaims.

VVha't I claim as new and desire to secure by United States LettersPatent, is:

1. A device of the character described comprising a head band,:acylindrical supporting member secured thereto, a receiver supportingmember having its body portion intermediate its ends formed into a loopoi a size to receive said cylindricajl supporting member by means of aforce fit so as to frictionally engage thesame to preventmovementthereon of its own accord.

2. A device of the character described comprising a head band having acylindrical member secured thereto, an adjustable receiver supportingmember having its body portion intermediate its ends formed into a loopof a size to receive said cylindrical member by means of a force fit soas to bear pressure against the sameto retain said supporting member inits adjusted position under normal pressure.

3. A device of the character described comprising a head band, a postsecured therer to, an adjustable member having its portion intermediateits ends formed into a loop of a size to receive said post and to gripthe same to hold said member in its adjusted position on said post underordinary pressure, and a receiver pivotally supported between the endsof said adjustable member.

4. In a device of the character described comprising a pair of headbands, a cylin-.

drical member secured to said head bands,

an adjustable member having a loop integrally formed therewith and ofsu'liicient size to frictionally engage said cylindrical member to holdthe same in its adjusted position, another member pivotally supportedbetween the ends of said adjustable member, and screw for engaging saidcylindrical member to prevent the disassociation of said adjustablememberand said cylindrical member. Y

5. A device of the character described'im eluding a pair ofhead bands, acylindrical member "for receiving a palrof ends of sald pair of headbands, means for securing said pair of ends to saidmember wherebysaidhead bands are secured to said member, a U- shaped adjustable supportingmember forpivotally supporting a receiver, said U,- shaped ad ustablemember having its body portion intermediate of its ends formed into aloop of a size to receive said cylindrical member by means of a forcefitto produce a spring efiect in said loop whereby said U- shapedsupporting member is clamped to said cylindrical member but to permitlongitudinal movement of said U-shaped supporting member along saidcylindrical member,

ERNEST A. BOHLMAN.

